Roughing machine



-4 1942- c. G. BROSTROM 2,291,688

ROUGHING MACHINE 2 Sheets-Sheet 1 Fil ed Feb. 25, 1941 Aug. 4, 1942. c.e. BROSTROM nouenme MACHINE Filed Feb. 25, 1941 2 Sheets-Sheet. 2

Patented Aug. 4, 1942 ROUGHING MACHINE Charles G. Brostrom, Salem, Mass,assignor to -United Shoe Machinery Corporation, Flemington, N. J acorporation of New Jersey Application February 25, 1941, Serial No.380,511

Claims.

This invention relates to roughing machines and is herein illustrated asembodied in a ma chine especially adapted for roughing the overlastedmargins of shoe uppers preparatory to coating them with cement forattaching outsoles thereto.

It is an object of the invention to provide an upper roughing machine ofsimple construction which can be employed to rough both flat and curvedsurfaces of the overasted margin of a shoe upper rapidly and uni ormlywithout the necessity for the exercise of a great amount of skill by theoperator.

Another object of the invention is to provide a duplex roughing machinehaving two separated vibratory roughing tools driven by mechanism soorganized that the forces applied to vibrate the tools are balanced,with the result that the machine will run smoothly and quietly.

In the illustrated machine, each roughing tool consists of an endlesswire-studded belt which is continuously driven, passing around threepulleys arranged in a triangle and cooperating with a stationary backingroll arranged near one of said pulleys in a manner to support againstdeflection and keep straight a short stretch of the belt at theoperating position. With this arrangement flat portions of the work maybe readily roughed in a uniform manner and when a curved surface isreached, it is only necessary to move the work slightly to a workingposition where the belt begins to curve around its supporting pulley.This provision of a straight stretch on a portion of the belt isadvantageous in roughing fiat surfaces as compared with the ordinarycircular roughing brush which inevitably tends to produce a concavesurface, the curvature of which increases as the radius of the brushdiminishes.

As shown and described herein, the roughing belts are continuouslyvibrated transversely by mechanism which moves certain of the beltguiding pulleys equally and oppositely in such a manner that the shocksoccurring at reversals of movement balance each other, thus cancelingthe vibratory effect of the shocks upon the machine as a whole andpermitting smooth and quiet operation.

These and other features of the invention and benefits afforded therebywill be better understood and appreciated by reading the followingdetailed description of one satisfactory embodiment thereof inconnection with the accompanying drawings, in which Fig. 1 is an angularView of the machine as a whole;

Fig. 2 is a side elevation of the machine, showing a lasted shoepresented to one of the roughing belts in normal working position;

Fig. 3 is a view in side elevation, with parts broken away, of a portionof the belt vibrating mechanism;

Fig. 4 is a plan View, partly in section on the line IV-IV, of a detailof the mechanism shown in Fig. 3;

Fig. 5 is a plan view of one of the belt-guiding pulleys with a belt inposition thereon;

Fig. 6 is a plan view of a detail of one of the belt backing rolls andthe shoe-gaging means; and

Fig. 7 is a cross-sectional view of the roughing belt.

Referring now to the drawings, the machine is carried by an uprightcolumn ID on which is supported a casting l2 constituting the head ofthe machine. Extending upward and rearward from the casting 12 arebrackets 14, I I6 supporting bearings I8, 20 in which runs a drive shaft22. A pulley 24 secured to the drive shaft is rotated by a belt 26 fromany suitable source of power.

Secured to the brackets I4, l6 by bolts 26 is a frame 28 havingforwardly extending portions 30, 32 symmetrically arranged at the leftand right sides of the machine, respectively, and affording support forthe operative elements of the machine. Inasmuch as this is a duplexmachine and the right-hand and left-hand mechanisms, althoughsymmetrical with respect to each other, are mechanically identical thesame reference characters will, in most instances, be used for both.

An endless roughing belt 34 which is driven continuously by a pulley 36secured to the shaft 22 passes around an upper guide pulley 38 journaledupon a stationary stud 40 mounted in the frame 28 and thence around alower guide pulley 42 which is journaled upon a stud 44 secured in theforward end of an arm 46 which is mounted to oscillate about a fixedstud 48 screwed into the frame 28 and secured by a set screw 50 (seeFig. 2)

Pivoted to the arm 46 by a pin 52 is one end of a connecting rod 54(from the right-hand roughing. mechanism) or 56 (from the left-handroughing mechanism) Extending forward from the frame 28 is a stationarybracket 58 in which is secured a stud 60 and pivotally mounted upon thisstud are two rocker arms 62, 64 to the forward ends of which arepivoted, respectively, the connecting rods 56 and 54 by means of pins 66and B8.

The rear ends of the rocker arms 62, 64 are forked, as shown at I8, I2,to receive sliding blocks I4, I6 which are journaled, respectively, uponeccentrics I8, 80 formed upon a shaft 82 running in a suitable bearingin the bracket 58. Secured to the upper end of the shaft 82 is a pulley84 connected by a belt 86 to a drive pulley 88 upon the shaft 22. Thebelt 86 passes over an idle pulley 90 mounted in a post 92 which isadjustably secured in the frame 28 by a set screw 94 to permitadjustment of the tension of the belt 86.

The eccentrics I8 and 80 are oppositely disposed, 180 apart, andinasmuch as the shaft 82 is driven continuously the two roughing beltguide pulleys 42 are continually vibrated transversely in oppositedirections through equal distances. The purpose of this is to producecontinual transverse vibratory movement of the belts 34, in order tofacilitate uniform roughing action by the avoidance of continuousgrooves or scratches in the work. Inasmuch as the amplitude of thisvibration need not be great, the throw of the eccentrics I8, 88, theshowing of which is somewhat exaggerated in .Figs. 3 and 4 for the sakeof clarity, is small.

The roughing belt 34 is similar to a carding belt, consisting of a stripof leather or canvas 96 (see Fig. 7) studded with wire staples 88 whichare embedded in, and surrounded by, a body of yielding felt Iiiii. Alayer I02 of fabric is secured to the back face of the belt to aid inholding the staples securely therein.

Mounted for free rotation in a fork I84 having a shank portion I88adjustably secured in the frame 28 by a set screw IE8 is a stationary,freely rotatable, backing roll III] which is positioned a short distanceabove the guide pulley 42 and serves to support against deflection andmaintain straight a short vertical stretch of the roughing belt at theoperating position despite the pressure of the work against the belt,the belt being fairly stiff and not susceptible to bending in the shortspace between the guide pulley and the backing roll.

In Fig. 2 a lasted shoe H2 is shown in engagement with the roughing beltand having the overlasted margin of its upper roughed thereby. In orderto prevent accidental use of the yieldable stretch of the belt above thebacking roll I I8 and facilitate the presentation of the shoe to theproper portion of the belt, there is provided, adjacent to the backingroll, a shoe gage consisting of a pair of rolls H4 which are freelyrotatable upon pins H6 secured in a holder H8 adjustably mounted bymeans of screws I28 upon a portion of the frame 28. The rolls IE4 arespaced apart slightly further than the width of the belt 34 to permitthe transverse vibration of the belt.

Secured in a stationary bracket I22 which depends from the frame 28 is aguard member I24 which lies close to the roughing belt below and towardthe front of the guide pulley 42 and serves to prevent the work or theoperators from bein injured by accidental contact with the portion ofthe belt beneath the pulley, although permitting the use of aconsiderable portion of the belt where it curves around the front of thepulley.

The two roughing belts 34 are space-d far enough apart to permit theirsimultaneous use by two operators, or they may be adapted to produceroughing of different grades of fineness, as sometimes required on asingle shoe, and both belts may be used by the same operator.

Having described the invention, what is claimed as new and desired to besecured by Letters Patent of the United States is:

1. In a roughing machine the combination of a pair of guide pulleys, anendless roughing belt passing around said guide pulleys, a stationarybackin member engaging a portion of the belt near one of said guidepulleys, to support that portion of the belt against deflection fromstraight line movement by pressure of the work thereagainst, and astationary guard member close to the face of the belt at the oppositeside of said guide pulley from said backing member and so positioned asto expose for use a portion of the belt where it is curved around thepulley.

2. A duplex roughing machine comprising a pair of separated,continuously driven, roughing tools, and means for vibrating said toolssimultaneously through equal distances in opposite directions transverseto the direction in which said tools are driven.

3. A duplex roughing machine comprising a pair of separated,continuously driven, roughing belts, and means for continually vibratingsaid belts, transversely to the direction in which they are driven,simultaneously through equal distances in opposite directions.

4. A duplex roughing machine comprising a pair of separated,continuously driven, roughing belts, a continuously driven shaft, 2.pair of oppositely directed eccentrics on said shaft and similarconnections between the eccentrics and the roughing belts, respectively,whereby the belts are continually vibrated in opposite directionstransversely to the direction in which they are driven.

5. In a roughing machine, the combination of a pair of space-d guidepulleys, an endless roughing belt passing around said guide pulleys, astationary backing roll engaging a portion of the belt near one of saidguide pulleys to support that portion of the belt against deflectionfrom straight line movement by pressure of the work thereagainst, and awork gage arranged adjacent to said backing roll to prevent accidentalpresentation of the work to a yieldable portion of the belt beyond thebacking roll.

CHARLES G. BROSTROM.

